Question: Analysis of variance has long been used in providing evidence
Analysis of variance has long been used in providing evidence of the effectiveness of pharmaceutical drugs. Such evidence is required before the Food and Drug Administration (FDA) will allow a drug to be marketed. In a recent test of the effectiveness of a new sleeping pill, three groups of 25 patients each were given the following treatments. The first group was given the drug, the second group was given a placebo, and the third group was given no treatment at all. The number of minutes it took each person to fall asleep was recorded. The results are as follows.
Use a computer (or hand calculations) to determine whether the drug is effective. What about the placebo? Give differences in average effectiveness, if any exist.
Answer to relevant QuestionsA more efficient experiment than the one described in problem 9-62 was carried out to determine whether a sleeping pill was effective. Each person in a random sample of 30 people was given the three treatments: drug, ...Let us continue discussing the ideas about studying wines using analysis of variance begun in the introduction to this chapter. The four important wine grapes in the introduction are to be compared using ANOVA to see whether ...An article in Worth discusses the immense success of one of the world’s most prestigious cars, the Aston Martin Vanquish. This car is expected to keep its value as it ages. Although this model is new, the article reports ...Repeat problem 10–23 for the situation in problem 10–17. Comment on your results. Recently, research efforts have focused on the problem of predicting a manufacturer’s market share by using information on the quality ...A regression analysis was carried out of returns on stocks (Y) versus the ratio of book to market value (X). The resulting prediction equation is Y = 1.21 + 3.1X (2.89) where the number in parentheses is the standard error ...
Post your question